Write the vector v in the form ai + bj, given its magnitude 
and the angle ? it makes with the positive x-axis.
= 15, ? = 210°
A. v = 15
B. v = 15
C. v = 15
D. v = 15
Answer: D
Mathematics
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Determine whether the argument is valid or invalid by using a truth table.p ? q~ p----? ~ q
A. 
The argument is valid.
B. 
The argument is invalid.
C. 
The argument is valid.
D. 
The argument is invalid.
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Identify the radicand.5x
A. 5x
B. y
C. y - 2
D. 
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Susan bought a 4-month $1,400 certificate of deposit. At the end of 4 months, she received $94 simple interest. Find the annual rate of simple interest paid. Round your answer to the nearest percent.
a. 20% b. 2% c. 45% d. 86%
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Factor when possible.x2 + 2xy - 63y2
A. (x + 7y)(x + y) B. (x + 7y)(x + 9y) C. (x - 7y)(x + 9y) D. Prime
Mathematics